下垂体卒中症状で発症した症候性ラトケ嚢胞の1例

A Symptomatic Rathke's Cleft Cyst with Pituitary Apoplexy : A Case Report

I．はじめに

　MRIの導入によりラトケ嚢胞の診断は容易となったが，その多くは無症候性で，症候性ラトケ嚢胞に遭遇することは比較的稀である．その臨床症状は，頭痛，嘔吐，視力，視野障害，複視，髄膜炎，下垂体機能低下で発症することが多い．

　今回われわれは，下垂体卒中症状で発症した症候性ラトケ嚢胞の稀な1例を経験したので，その発生機序について若干の文献的考察を加え報告する．

We encountered a rare case of symptomatic Rathke's cleft cyst associated with pituitary apoplexy. Toour knowledge, six cases have been reported in the literature. The mechanism of this symptom is stillobscure because of the rare pathological findings concerning Rathke's cleft cysts. Judging from the opera-tive and the histopathologic findings, we speculate that pituitary apoplexy could occur due to hemorrhagefrom certain vessels such as compressed portal veins or newly organized vessels of the granulation tissueof the cyst wall.